Multifunctional chair

ABSTRACT

The present invention relates to a multifunctional chair which is configured to train, rehabilitate, and correct the back spine, pelvis and knee joints of the user. The angle of inclination of a seat member can be adjusted arbitrarily to the front, rear, left and right, thereby preventing back injury due to a sharp angle of inclination from the outset, while at the same time completely preventing rocking of the seat member when back exercises are not being carried out and thus allowing the chair to be used as a general chair. A rolling member provided in a lower part of the seat is improved, thereby imparting a cushioned feel to the seat while restricting the range of tilting movement of the seat to only front-and-back, left-and-right and multidirectional and preventing rotation in such a way as to limit excessive rocking of the seat overall and hence prevent side effects from seated exercises.

TECHNICAL FIELD

The present invention relates to a multifunctional chair which aims attraining, rehabilitating and correcting a users back spine, pelvises andknee joints, and in particular to a multifunctional chair which isdirected to preventing a waist injury which might occur due to a sharpslope angle when a user first sits by providing a function of freelyadjusting a slope angle in forward, backward, leftward and rightwarddirections, and when a waist is not exercised, it is possible to preventwell the movements of a seat member, thus being used as an ordinarychair. The sitting seat is made to have a good cushion feeling byimproving a rolling member provided beneath a seat, and the movementrange of a slope of a seat is limited to a forward and backwarddirection and a leftward and rightward direction and multipledirections, respectively, whereas the rotation is prevented, thuslimiting an over movement of a sitting seat in whole and preventing aside effect in terms of a sitting type exercise.

BACKGROUND ART

There are various types of exercise tools which help do a properexercise for each part of a human body and help rehabilitate a hurt orweakened portion of it. A multifunctional chair which is a similar oneamong multiple tools is disclosed in Korean patent application number10-2005-40701.

As shown in FIG. 1, a back spine correction apparatus formed of a gascylinder disposed at an upper side of a support having a moving memberat its lower side, a rod inserted in an upward and downward movable wayinto the interior of the gas cylinder, and a lower member formed of agas absorber inserted in a movable way in the interior and protrudedfrom the upper side of the rod comprises a housing 24 in which anoutward protrusion part 22 is formed, with a vertical hole 22 a, intowhich the top of the rod 16 is inserted, passing through the outwardprotrusion part 22, and an inner side protrusion part 23 with aninsertion groove 23 a is integrally formed, and a gas absorber operationmember 30 is provided for the purpose of operating the gas absorber 18;an ascending and descending movement device 20 which is formed of ahousing casing 27 fixedly engaged at the top of the housing 24; arolling means B which is disposed between the housing casing 27 and thelower side of the seat member 1 and has an unlocking member 60 forselectively retaining the rolling and unrolling with respect to the seatmember 1; a rotation support plate 82 which is rotatably fixed at eitherinner side of the housing 24 by way of a horizontal rotation shaft 81and which is protruded from the backside of the housing 24; a backrestframe 83 which is fixedly engaged to the interior of the backside of therotation support plate 82 and is spun (tilted) and supported in theoutward direction by way of a tilting support means C, and a backresttilting device 80 which is provided at a front side region of thehousing 24 and has a tilting unlocking means D for unlocking the tiltedstate in an outward direction of the backrest frame 83.

In addition, as shown in FIG. 2, the rolling means B comprises a rollingcasing 52 which is fixedly engaged at a lower, central region of theseat member 1 and in which a cushion protrusion part 50 having a bearingrolling groove 50 a is formed at a lower, central region, and a cushionprotrusion 51 with a cushion groove 51 a is integrally formed at anupper, central region; a rolling bearing 54 which is elasticallyinserted in the bearing rolling groove 50 a and performs a rotationrolling movement at a proper angle and which is fixed at an outersurface of a through hole 27 a of an upper side of the housing casing27; a fixing bolt 55 which passes through the through hole 27 a of thehousing casing 27 and the inner diameter of the rolling bearing 54, afixing nut 56 which is fixedly engaged to the fixing bolt 55 for therebyfixing the fixing bolt 55 to the housing casing 27, a cushion member 57which is pressed and fixed at an upper, outer side of the fixing bolt 55and is inserted to protrude from the inner side of the cushion groove 51a of the cushion protrusion 51 to the outside and is made from anurethane material; and a unlocking member 60 which is closely disposedbetween the upper side of the housing casing 27 and the rollingprotrusion part 50 for thereby selectively retaining the rolling andunrolling states of the seat member 1.

However, in the above described conventional multifunctional chair, therolling mean B is characterized in that the slope angle of the rollingin terms of the seat member 1 is determined by means of a cushion member57 made from a urethane material, when the elasticity of the cushionmember 57 is weakened or it is damaged, the shape of the seat member 1is deformed in one direction or the slope angles of the forward,backward, leftward and rightward directions become inaccurate, so theinjuries of the users such as weak persons might be worsened. Sincethere is not a means for fixing the seat member 1 in place, not to move,in the conventional art, it is needed for a user to sit after he adjuststhe seat member 1 to a normal position, thus causing, anyinconveniences.

Since there is not a means for adjusting a slope angle of the seatmember 1 in a conventional art, when an old or weak person or a user whosuffers from a weak waist sits carelessly, since the slope angle thatthe seat member 1 inclines at is too large, a user might have a waistinjury.

The conventional multifunctional chair comprise a moving means which ismovable being supported on the ground, a gas absorber which is uprightinstalled at the moving means for thereby adjusting the height of theseat, a fixing bracket which is installed at the top of the gas absorberand has a height adjusting part with a three-stage fixing shoulder atits outer surface and integrally has a vertical rod at its center, thevertical rod having an engaging hole at its top, a seat support memberwhich has a connection boss part having at its center an installationhole guiding a vertical rod provided at the center of the fixingbracket, the upper side of the seat support member being connected withthe lower side of the sitting seat, a rolling adjusting lever whichpasses through the rolling member disposed between the seat supportmember and the fixing bracket and integrally has a slope angle adjustingshoulder at the inner diameter for thereby being selectively engagedwith the three-stage fixing shoulder of the height adjusting part forthereby adjusting in multiple stages the height of the seat supportmember with respect to the rolling member, and a spherical bearing and aspherical bussing which are engaged at the end portions of the engagingbolt and the vertical rod engaged to the vertical rod of the fixingbracket from the upper side of the seat support member for therebyinducing the movements of the central portions of the seat supportmember.

However, in the above described conventional multifunctional chair, therolling of the sitting seat contributes to adjusting step by step therolling slope by adjusting the height of the seat support member by wayof the rolling adjusting lever by adapting the vertical rod of thefixing bracket as an axis; however the rolling operation has a problemthat it spins out of the movement ranges in the forward, backward,leftward and rightward directions of the sitting seat, so the overmovements of the seat might cause side effects in terms of the sittingtype exercise.

It is disadvantageous that the cushion feeling of the sitting seat isgenerally worsened in whole in the range of limiting the rollingoperations, which results in the degradation of the chair which actuallyhas both chair function and exercise function.

DISCLOSURE OF INVENTION

Accordingly, the present invention is invented so as to resolve theabove described problems. It is an object of the present invention toprovide a multifunctional chair which is characterized in that it ispossible to prevent a user from injuries due to a sharp slope in such away to properly adjust the slope depending on a user by providing arolling adjusting means which can freely adjust the slope angle in theforward, backward, leftward and rightward directions of the rollingmeans installed at the lower side of the seat member, and the presentinvention can be used for the purpose of an ordinary chair by handlingthe seat member not to move by making use of the rolling adjustingmeans, and the present invention helps a user sit easily in such a wayto fix, at the upper housing fixed with the seat member, the top of aspring member, which is shaped like a double-headed drum with a narrowwaist in the middle, after the spring member is elastically installed atthe rolling adjusting means, and in such a way to fix the lower end ofthe spring member at the lower housing connected with the moving means,so the seat member is always positioned in normal place for therebyallowing the user to sit easily.

It is another object of the present invention to provide amultifunctional chair which has a rotation prevention function of a seatwhen conducting a sitting type exercise for the purpose of preventingside effects in terms of a sitting type exercise in such a way toprovide a good cushion feeling of a sitting seat by improving therolling member provided at the lower side of the sitting seat and insuch a way to limit the slope movement range of the sitting seat to theforward, backward, leftward and rightward directions and in such a wayto limit in whole the over movements of the seat while preventing therotations.

To achieve the above objects, there is provided a multifunctional chairwhich includes a support member having a moving means at its lower side;an ascending and descending member which is upwardly installed from thecenter of the support member and serves to adjust the height with theaid of an operation rod in the interior of a gas cylinder; a rollingmember which is installed at the top of the ascending and descendingmember and is installed in a rolling possible way in a forward,backward, leftward or rightward direction, and a seat member which isinstalled at the top of the rolling member and allows a user to sit insafe, the multifunctional chair comprising a fixing bracket which isinstalled at the top of an operation rod of the ascending and descendingmember and in which an arm rest is fixed at either side of it, avertical rod with a certain height is installed at its central, upperside, and at the top of the vertical rod is installed a seat plateengaged and installed at the bottom surface of the seat member and thetop of the fixing bracket; a rolling adjusting means in which acylindrical adjusting part is integrally formed at its peripheralportion with a certain interval from the vertical rod at the top of thefixing bracket, and a plurality of fixing shoulders are formed atinclined angles in multiple steps at the outer surface of the adjustingpart, and a height adjusting part is installed at the outer surface ofthe fixing shoulder in such a way to slide-rotate together with it, anda stopper is formed at an inner surface of the height adjusting part andslides along a plurality of fixing shoulders, and as the lever of oneside of the height adjusting part is tilted, its upper side comes intocontact with a circular protrusion part provided beneath the seat plateor comes separated from it for thereby preventing the rolling of theseat member or adjusting the rolling angle of it; and a rolling memberin which a spring serving the rolling of the seat member is installed atan outer surface of the vertical rod between the fixing shoulder and theseat plate, and a spherical plane, which is kind of a bearing, isinstalled at a bearing hole of the seat plate, and the top of thevertical rod is engaged by an engaging bolt at the ball bearing.

In addition, the present invention is characterized in that a spring iselastically installed between the fixing shoulder and the seat plate,and a lower end portion of the spring is engaged to a fixing grooveformed at one side of the fixing shoulder, and an upper end portion ofthe spring is engaged to a fixing groove formed at one side of thefixing shoulder of the lower side of the seat plate, so the seat memberof the upper side of the seat plate is always positioned in normalplace.

The present invention is further characterized in that an operationspace part into which the top of the operation rod of the ascending anddescending member is inserted is formed at the lower side of the fixingbracket, and at one side of the operation space part is installed anoperation lever as a two-stage operation hole is formed in a lateraldirection, and one end of the operation lever inserted into the interiorof the two-stage operation hole comes into contact with the gas absorberof the operation rod or comes separated from it for thereby controllingthe ascending and descending operations of the ascending and descendingmember or obtaining a continuous ascending operation.

In addition, the present invention is characterized in that a wrinkletube made from a rubber material is installed between the upper side ofthe height adjusting part and the protrusion part of the lower side ofthe seat plate for improving the lowering operation of the heightadjusting part.

A multifunctional chair which includes a moving means supporting from alower surface for movements, an ascending and descending member which isupright installed at the moving means and serves to adjust the height ofthe sitting seat, a fixing bracket which is installed at the top of theascending and descending member and has at its outer surface a heightadjusting part with a three-stage fixing shoulder and integrally has atits central upper portion a vertical rod with a connection hole, a seatplate which has a connection boss part having at its central portion aninstallation hole guiding the vertical rod provided at the center of thefixing bracket, with the upper side of the seat plate being connectedwith the lower side of the sitting seat, a rolling adjusting means whichpasses through the rolling member installed between the seat plate andthe fixing bracket and integrally has a slope adjusting shoulder at itsinner diameter for being selectively engaged from the three-stage fixingshoulder of the height adjusting part for thereby adjusting in multiplesteps the height of the seat plate with respect to the rolling member,and a spherical plane and a spherical ball bearing which are engaged atthe engaging bolt engaged to the vertical rod of the fixing bracket fromthe upper side of the seat plate and at the end portion of the verticalrod for thereby guiding the movements at the central portions of theseat plate,

the multifunctional chair comprising hexagonal engaging grooves whichare provided correspondingly at the inner diameter of the heightadjusting part of the fixing bracket corresponding to the connectionboss part of the seat plate engaging the rolling member, and saidrolling member is characterized in that a hexagonal engaging part isformed at the upper and lower portions in a hollow shape to accommodatetherein the vertical rod, and a spiral body is formed between thehexagonal engaging part, and a compression spring is provided at theinner side of the body for preventing the twisting of the rolling membertogether with the cushion function of the sitting seat.

The body of the rolling member is made from a rubber material of aurethane.

ADVANTAGEOUS EFFECTS

The present invention has very efficient effects since it ischaracterized in that it is possible to prevent injuries which mightoccur due to a sharp slope in such a way to properly adjust the slopeangle depending on a user by providing a rolling adjusting means whichcan freely adjust the slope angles in the forward, backward, leftwardand rightward directions of the rolling means installed at the lowerside of the seat member, and the multifunctional chair of the presentinvention can be used for the purpose of an ordinary chair in such a wayto handle the seat member not to move by making use of the rollingadjusting means, and a spring member, which is shaped like adouble-headed drum with a narrow waist in the middle, is elasticallyinstalled at a rolling adjusting means, and the top of it is fixed atthe upper housing fixed with the seat member, and the lower side of thespring member is fixed at the lower housing connected with the movingmeans, so the user can easily sit since the seat member is alwayspositioned in normal place.

The present invention has advantageous effects that the multifunctionalchair of the present invention can be usefully used as a multifunctionalchair having both ordinary chair function and sitting type exercisefunction in such a way to prevent the injuries and side effects whichmight occur due to the over movements during the sitting type exerciseby preventing the unnecessary twisting operations of the sitting seatduring the sitting type exercise using the sitting seat as a hexagonalhead part belonging to the rolling member is engaged to a hexagonalengaging groove provided at the height adjusting parts of the rollingadjusting lever and the fixing bracket which intermittently adjust theheights of the seat support member in terms of the rotations of thesitting seat when the sitting seat rolls in the forward, backward,leftward or rightward direction, and the multifunctional chair of thepresent invention can be efficiently used for a multifunctional chairwhich has both ordinary chair function and sitting type exercisefunction by providing a sitting seat with a cushion feeling with the aidof the material of the body of the rolling member and the compressionspring provided in the interior.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front view illustrating a conventional multifunctionalchair.

FIG. 2 is a side cross sectional view illustrating the key elements of aconventional multifunctional chair.

FIG. 3 is a disassembled perspective view illustrating a rolling memberof a multifunctional chair according to the present invention.

FIG. 4 is a perspective view illustrating a rolling member of FIG. 3.

FIG. 5 is a side cross sectional view illustrating the key elements of amultifunctional chair according to the present invention.

FIG. 6 is a view illustrating in sequence the operation states of arolling adjusting means of a multifunctional chair according to thepresent invention.

FIG. 7 is a front cross sectional view illustrating the key elements ofa multifunctional chair according to the present invention.

FIG. 8 is a front view illustrating a multifunctional chair according toan example of the present invention.

FIG. 9 is a perspective view illustrating the key elements of amultifunctional chair after separating them in FIG. 8.

FIG. 10 is a perspective view illustrating a state that the elements ofFIG. 9 are combined.

FIG. 11 is a perspective view illustrating a rotation prevention partinstalled between a rolling means and a seat plate of FIG. 8.

FIG. 12 is an enlarged cross sectional view illustrating by cutting awaya rotation prevention part of FIG. 11.

FIGS. 13 and 14 are vertical cross sectional views illustrating keyelements in a rolling state and a fixing state of a multifunctionalchair according to the present invention.

FIG. 15 is a view illustrating a description of a height adjusting stateby exploding key elements of a height adjusting mean and a rollingadjusting means of a fixing bracket according to the present invention.

BEST MODES FOR CARRYING OUT THE INVENTION

The preferred embodiments of the present invention will be describedwith reference to the accompanying drawings.

In the multifunctional chair which includes a support member 100 havinga moving means 110 at its lower side; an ascending and descending member200 which is upwardly installed from the center of the support member100 and serves to adjust the height with the aid of an operation rod 220in the interior of a gas cylinder 210; a rolling member 300 which isinstalled at the top of the ascending and descending member 200 and isinstalled in a rolling possible way in a forward, backward, leftward orrightward direction, and a seat member 400 which is installed at the topof the rolling member 300 and allows a user to sit in safe,

the fixing bracket 500 installed at the top of the operation rod 220 ofthe ascending and descending member 200, as shown in FIGS. 3 and 4, ischaracterized in that an arm rest fixing part 510 at either side ofwhich an arm rest 410 of a seat member 400 is stably fixed is provided,and at a central, upper portion of the fixing bracket 500 is provided avertical rod 520 with a certain height, and at the top of the verticalrod 520 is provided an insertion part 530, and a connection hole 540passes through the central axis line of the insertion part 530.

At the central, lower side of the fixing bracket 500 is formed anoperation space part 550 into which the top of the operation rod 220 ofthe ascending and descending member 200 is inserted, and at one side ofthe operation space part 550 is formed an installation hole 551, and inthe installation hole 551 is engaged an operation cap 553 with atwo-stage operation hole 552, and at the two-stage operation hole 552 ofthe operation cap 553 is installed the operation lever 554 with acertain length with the aid of the engaging pin 555. Here, one end ofthe operation lever 554 inserted into the inner side of the two-stageoperation hole 552 corresponds to the gas absorber 221 of the operationrod 220.

In other words, when the operation lever 554 is pushed in a lateraldirection and is moved to the two-stage operation hole 552 positioned atthe lateral side of the two-stage operation hole 552, the end portion ofthe operation lever 554 is separated from the gas absorber 221, so theoperation rod 220 ascends, and the operation lever 554 in pushed in thetwo-stage operation hole 552 which remained in the original position, sothe end portion of the operation lever 554 comes into contact with thegas absorber 221, whereby the operation rod 220 is fixed in place.

At the top of the fixing bracket 500 is installed a rolling adjustingpart 600 adjusting the tilting of the seat member 400. A cylindricaladjusting part 610 is integrally formed around the rolling adjustingpart 600 at a certain distance from the vertical rod 520 of the fixingbracket 500, and at an outer surface of the adjusting part 610 isinstalled at a certain inclined angle the fixing shoulder 620 connected,for example, in a three-stage structure.

At an outer surface of the adjusting part 610 is installed a heightadjusting part 630 having a spring insertion hole 633 for the sake of aslide rotation in response thereto, and at the inner surface of theheight adjusting part 630 is provided a stopper 631 which slides along aplurality of fixing shoulders 620 as shown in FIG. 4, so as the lever632 at one side of the height adjusting part 630 is tilted, the top ofthe height adjusting part 630 as shown in FIG. 5 comes into contact witha circular protrusion part 411 provided beneath the seat plate 410 orcomes distanced from it for thereby preventing the rolling of the seatmember 400 or coming to sequentially adjusting the rolling angles of it.

A rolling member 300 is installed between the adjusting part 610 of thefixing bracket 500 and the protrusion part 411 of the seat plate 410,and a spring 310, which is shaped like a double-headed drum with anarrow waste at its middle, is installed at an outer surface of thevertical rod 520 between the fixing shoulder 620 and the seat plate 410for thereby maintaining a horizontal state and a rolling operation ofthe seat member 400, and at the bearing hole 412 of the seat plate 410is installed a spherical plane 320 which is a kind of the bearing. Theengaging bolt 330 is forced to pass through the ball bearing 321 and isengaged with a nut 340 in the operation space part 550 of the lower sideof the vertical rod 520, so the separated seat member 400 and fixingbracket 500 come to be engaged with each other.

At this time, the spring 310 is elastically installed, and the lower endportion of the spring 310 is engaged to the fixing groove 640 formed atone side of the adjusting part 610 with the fixing shoulder 620. Theupper end portion of the spring 310 is engaged to the fixing groove (notshown) formed at one side of the fixing shoulder 620 of the lower sideof the seat plate 410, so as such the seat member 400 of the upper sideof the seat plate 410 does not move in a left or right direction, inother words, always stays in place.

A wrinkle tube 700 made from a rubber material is installed between theupper side of the height adjusting part 630 and the protrusion part 411of the lower side of the seat plate 420 for thereby making easier thedescending of the height adjusting part 630 with the aid of theelasticity of the wrinkle tube 700 and for thereby covering the upperside of the height adjusting part 630 and the protrusion part 411 of thelower side of the seat plate 410 not to be seen from the outside.

As show in FIGS. 8 to 15, the multifunctional chair according to anembodiment of the present invention corresponds to a multifunctionalchair with a sitting type exercise function.

A multifunctional chair which includes a moving means 110 supportingfrom a lower surface for movements, an ascending and descending member120 which is upright installed at the moving means 110 and serves toadjust the height of the sitting seat, a fixing bracket 130 which isinstalled at the top of the ascending and descending ember 120 and hasat its outer surface a height adjusting part 132 with a three-stagefixing shoulder 131 and integrally has at its central upper portion avertical rod 133 with a connection hole 133 a, a seat plate 140 whichhas a connection boss part 141 having at its central portion aninstallation hole 141 a guiding the vertical rod 133 provided at thecenter of the fixing bracket 130, with the upper side of the seat plate140 being connected with the lower side of the sitting seat, a rollingadjusting means 160 which passes through the rolling member 150installed between the seat plate 140 and the fixing bracket 130 andintegrally has a slope adjusting shoulder 162 at its inner diameter forbeing selectively engaged from the three-stage fixing shoulder 131 ofthe height adjusting part 132 for thereby adjusting in multiple stepsthe height of the seat plate 140 with respect to the rolling member 150,and a spherical plane 320 and a spherical ball bearing 321 which areengaged at the engaging bolt 170 engaged to the vertical rod 133 of thefixing bracket 130 from the upper side of the seat plate 140 and at theend portion of the vertical rod 133 for thereby guiding the movements atthe central portions of the seat plate 140, comprising:

hexagonal engaging grooves 140 a and 130 a which are providedcorrespondingly at the inner diameter of the height adjusting part 132of the fixing bracket 130 corresponding to the connection boss part 141of the seat plate 140 engaging the rolling member 150, and said rollingmember 150 is characterized in that a hexagonal engaging part 152 isformed at the upper and lower portions in a hollow shape to accommodatetherein the vertical rod, and a spiral body 154 is formed between thehexagonal engaging part 152, and a compression spring 156 is provided atthe inner side of the body 154 for preventing the twisting of therolling member 150 together with the cushion function of the sittingseat.

The body 154 of the rolling member 150 is made from a rubber material ofa urethane.

MODES FOR CARRYING OUT THE INVENTION

The operations and effects of the multifunctional chair according to thepresent invention will be described.

First of all, the height adjusting part 630 of the rolling adjustingpart 600 is engaged to the adjusting part 610 of the upper side of thefixing bracket 500. Here, as the stopper 631 of the height adjustingpart 630 is engaged to the fixing shoulder 620 of the outer surface ofthe adjusting part 610 and the lever 632 of one side of the heightadjusting part 630 is tilted, as shown in FIGS. 5 and 6, the upper sideof the height adjusting part 630 comes into contact with the circularprotrusion part 411 provided beneath the seat plate 410 or comesdistanced from it for thereby preventing the rolling of the seat member400 or coming to sequentially adjusting the rolling angles of it.

Next, the spring 310 is engaged to the spring insertion hole 633 of theheight adjusting part 630 and is mounted at the vertical rod 520, andthe engaging bolt 330 is forced to pass through the ball bearing 321 ofthe spherical plane 320 engaged with the seat plate 410 and is engagedwith a nut 340 in the interior of the operation space part 550 of thelower side of the vertical rod 520, so the separated seat member 400 andfixing bracket 500 are engaged with each other.

At this time, the lower end portion of the spring 310 is engaged to thefixing groove 640 formed at one side of the adjusting part 610 with afixing shoulder 620. The upper end portion of the spring 310 is engagedto the fixing groove (not shown) formed at one side of the fixingshoulder 620 of the lower side of the seat plate 410, so the seat member400 of the upper side of the seat plate 410 does not move in a leftwardor rightward direction, namely, it always stays in normal place.

The operation lever 554 is fixed, in an operation possible way with theengaging pin 555, at the installation hole 551 connected with thelateral side of the operation space part 550 of the lower side of thefixing bracket 500, and one end of the operation lever 554 inserted intothe inner side of the two-stage operation hole 552 is matched with thegas absorber 221 of the operation rod 220.

When it is supposed to perform a waste exercise after themultifunctional chair is assembled in the above mentioned manner, a usersits at the seat member 400. At this time, the seat member 400 keeps ahorizontal state by means of the elastic force of the spring 310;however it is connected in a rolling possible way by means of only theball bearing 321 of the spherical plane 320, so a user who for the firsttime uses a multifunctional chair might feel a little unstable, so it ispreferred to reduce a little the rolling angle of the seat member 400for thereby preventing injuries which might occur due to the sharplychanging rolling angle.

In other words, as shown in (b) of FIG. 6, the multifunctional chair atthe first stage has a stopper 631 at the fixing shoulder 620 of thelower most portion. At this time, as shown in (a) of FIG. 5, since theinterval between the height adjusting part 630 and the protrusion part411 of the seat plate 410 is too large, the tilting angle of the seatmember 400 in the forward, backward, leftward or rightward is about 20°,too large angle.

As for the user who uses for the first time or the weak or old user, itis needed to tilt the lever 632 of the rolling adjusting part 600 in onedirection. As shown in (c) of FIG. 6, the stopper 631 travels over thefixing shoulder 620 positioned at the intermediate portion, so theinterval between the height adjusting part 630 and the protrusion part411 is narrowed, and the tilting angle of the seat member 400 in theforward, backward, leftward or rightward direction becomes above 10°, soas such the user is prevented from injured.

In addition, when it is supposed to use the multifunctional chair as anordinary chair, it is needed to move the stopper 631 up to the fixingshoulder 620 of the upper most portion. At this time, as shown in (b) ofFIG. 5, the adjusting part 630 and the protrusion part 411 become closerto each other, so the rolling phenomenon of the chair does not takeplace.

When the lever 632 of the rolling adjusting part 600 is tilted in thedirection which is opposite the above-mentioned direction, as shown in(a) of FIG. 6, the stopper 631 descends to the fixing shoulder 620positioned at the lower most portion, thus increasing the intervalbetween the adjusting part 630 and the protrusion part 411. At thistime, the user does exercise moving his waste in the forward, backward,leftward or rightward direction. Since the wrinkle tube 700 made from arubber material is installed between the upper side of the heightadjusting part 630 and the protrusion part 411 of the lower side of theseat plate 410, the height adjusting part 630 can very easily descendwith the aid of elastic force of the wrinkle tube 700, and as such it ispossible to cover the upper side of the height adjusting part 630 andthe protrusion part 411 of the lower side of the seat plate 410 not tobe seen from the outside.

When it is needed to conduct the ascending and descending exercise withthe multifunctional chair, the adjusting part 630 and the protrusionpart 411 are forced to be close in order for the rolling phenomenon ofthe seat member 400 not to take place, and the operation lever 554 ispushed in the lateral direction and is moved to the two-stage operationhole 552 positioned at the lateral portion of the two-stage operationhole 552. At this time, the end portion of the operation lever 554 isseparated from the gas absorber 221, so the operation rod 220 comes toascend freely. In other words, when a user gets up from the seat member400, since the operation rod 220 ascends since the operation rod 220descends when the user sits in the seat member 400, so as such it ispossible for a user to perform a certain exercise.

In the present invention, the multifunctional chair having a function ofpreventing the rotation during the sitting type exercise ischaracterized in that the three-stage fixing shoulder 131 formed in theheight adjusting part 132 of the fixing bracket 130 is formed in acircumference. When the above-mentioned construction is exploded andviewed, as shown in FIG. 15, it is seen like a staircase shape in whichone side is inclined, with the advantageous construction of which thestopper 162 formed at the inner diameters of the rolling adjusting part160 can best move and be fixedly positioned at the lower most portionand the upper most portion.

From the upper side of the rolling adjusting part 160, in which thefixing bracket 130 is installed, is a little protruded a rubber ringmember 163, which is made from a urethane material at the upper side ofthe rolling adjusting part 160, more than the upper surface of therolling adjusting part 160. The rubber ring member 163 comes into closecontact with the lower surface of the connection boss part 141 of theseat plate 140 for thereby elastically supporting during the rolling ofthe sitting seat or at the time when fixing.

The stopper 162 is divided into three parts in a spiral shape, one sideof which is inclined for the stopper 162 to easily move from thethree-stage fixing shoulder 131. As such the stopper 162 can move fromthe three-stage fixing shoulder 131 of the height adjusting part 132 byrotating the rolling adjusting part 160 while holding one side of therolling adjusting part 160. Here, the seat plate 140 has a certaininterval, as much as the distance that the stopper 162 moves, from theupper surface of the rubber ring member 163 at the side of the rollingadjusting part 160 along with the sitting seat with respect to therolling member 150 which is assembled as the hexagonal engaging part 152of the upper and lower sides is engaged between the seat plate 140 fromthe fixing bracket 130.

As shown in FIG. 13, the above mentioned interval is created owing tothe differences in heights, so the user can do exercise while sitting inthe sitting seat as the user moves the sitting eat in the forward,backward, leftward or rightward direction.

The above mentioned sitting type exercise contributes to exercising ortraining the back spine including pelvises and knee joints of the bodyin a sitting posture or contributes to the rehabilitation in relationwith the posture corrections.

The motions of the sitting seat are related to the slope, in otherwords, the rolling movements. Since the hexagonal engaging part 152 ofthe rolling member 150 is assembled to the hexagonal engaging grooves130 a and 140 a formed at the inner diameters of the fixing bracket 130and the connection boss part 141 of the seat plate 140, the twistingmotions of the sitting seat can be prevented, which leads to preventingthe unnecessary movements of the sitting seat.

The twisting prevention of the sitting seat in the multifunctional chaircontributes to previously prevent the sitting seat and user's waist fromabruptly rotating while the user exercises pelvises in a sittingposture, thus preventing the side effects of the exercise which mightbring injuries.

In case of FIG. 14, the lower surface of the seat plate 140 comes intoclose contact with the rubber ring member 163 of the upper surface ofthe rolling adjusting part 160 by positioning the stopper 162 at theupper most portion of the fixing shoulder 131 of the height adjustingpart 132 by rotating the rolling adjusting part 160, in other words, theoperation state of which contributes to preventing the rolling of theseat plate 140. Here, the rubber ring member 163 provides a goodclose-contact performance and a good cushion feeling with the aid of thenature of the materials. The above mentioned state might be converted tothe state that the present invention can be used for the purpose of anordinary chair.

In a state that the mode is changed to the ordinary chair mode, therolling member 150 provides a cushion effect with the aid of theelasticity of the material itself of the body 154 and the compressionspring 156 installed in the interior when a user sits in or gets up fromthe sitting seat, which reduces a users sitting burden when sitting.

When the multifunctional chair is used for the purpose of a chairexclusive mode at the side surface, the height adjusting lever 111connected to the ascending and descending member 120 installed at thefixing bracket 130 is operated, thus adjusting the heights of thesitting seat of the chair for the purpose of use.

INDUSTRIAL APPLICABILITY

There are various kinds of tools developed for the purpose of providinga proper exercise to each portion of a human body and performing arehabilitation therapy on injuries and portions with weakened functions,and the present invention provided a multifunctional chair helping do asitting type exercise by providing a function to the chair.

chair, rolling, seat, sitting plate

1. A multifunctional chair which includes a support member having amoving means at its lower side; an ascending and descending member whichis upwardly installed from the center of the support member and servesto adjust the height with the aid of an operation rod in the interior ofa gas cylinder; a rolling member which is installed at the top of theascending and descending member and is installed in a rolling possibleway in a forward, backward, leftward or rightward direction, and a seatmember which is installed at the top of the rolling member and allows auser to sit in safe, comprising: a fixing bracket which is installed atthe top of an operation rod of the ascending and descending member andin which an arm rest is fixed at either side of it, a vertical rod witha certain height is installed at its central, upper side, and at the topof the vertical rod is installed a seat plate engaged and installed atthe lower surface of the seat member and at the top of the fixingbracket; a rolling adjusting means in which a cylindrical adjusting partis integrally ford at its peripheral portion with a certain intervalfrom the vertical rod at the top of the fixing bracket, and a pluralityof fixing shoulders are formed at inclined angles in multiple steps atthe outer surface of the adjusting part, and a height adjusting part isinstalled at the outer surface of the fixing shoulder in such a way toslide-rotate together with it, and a stopper is formed at an innersurface of the height adjusting part and slides along a plurality offixing shoulders, and as the lever of one side of the height adjustingpart is tilted, its upper side comes into contact with a circularprotrusion part provided beneath the seat plate or comes separated fromit for thereby preventing the rolling of the seat member or adjustingthe rolling angle of it; and a rolling member in which a spring servingthe rolling of the seat member is installed at an outer surface of thevertical rod between the fixing shoulder and the seat plate, and aspherical plane, which is kind of a bearing, is installed at a bearinghole of the seat plate, and the top of the vertical rod is engaged by anengaging bolt at the ball bearing.
 2. A multifunctional chair accordingto claim 1, wherein a spring is elastically installed between the fixingshoulder and the seat plate, and a lower end portion of the spring isengaged to a fixing groove formed at one side of the fixing shoulder,and an upper end portion of the spring is engaged to a fixing grooveformed at one side of the fixing shoulder of the lower side of the seatplate, so the seat member of the upper side of the seat plate is alwayspositioned in normal place.
 3. A multifunctional chair according toclaim 1, wherein an operation space part into which the top of theoperation rod of the ascending and descending member is inserted isformed at the lower side of the fixing bracket, and at one side of theoperation space part is installed an operation lever as a two-stageoperation hole is formed in a lateral direction, and one end of theoperation lever inserted into the interior of the two-stage operationhole comes into contact with the gas absorber of the operation rod orcomes separated from it for thereby controlling the ascending anddescending operations of the ascending and descending member orobtaining a continuous ascending operation.
 4. A multifunctional chairaccording to claim 1, wherein a wrinkle tube made from a rubber materialis installed between the upper side of the height adjusting part and theprotrusion part of the lower side of the seat plate for improving thelowering operation of the height adjusting part.
 5. A multifunctionalchair which includes a moving means 110 supporting from a lower surfacefor movements, an ascending and descending member 120 which is uprightinstalled at the moving means 110 and serves to adjust the height of thesitting seat, a fixing bracket 130 which is installed at the top of theascending and descending member 120 and has at its outer surface aheight adjusting part 132 with a three-stage fixing shoulder 131 andintegrally has at its central upper portion a vertical rod 133 with aconnection hole 133 a, a seat plate 140 which has a connection boss part141 having at its central portion an installation hole 141 a guiding thevertical rod 133 provided at the center of the fixing bracket 130, withthe upper side of the seat plate 140 being connected with the lower sideof the sitting seat, a rolling adjusting means 160 which passes throughthe rolling member 150 installed between the seat plate 140 and thefixing bracket 130 and integrally has a slope adjusting shoulder 162 atits inner diameter for being selectively engaged from the three-stagefixing shoulder 131 of the height adjusting part 132 for therebyadjusting in multiple steps the height of the seat plate 140 withrespect to the rolling member 150, and a spherical plane 320 and aspherical ball bearing 321 which are engaged at the engaging bolt 170engaged to the vertical rod 133 of the fixing bracket 130 from the upperside of the seat plate 140 and at the end portion of the vertical rod133 for thereby guiding the movements at the central portions of theseat plate 140, comprising: hexagonal engaging grooves 140 a and 130 awhich are provided correspondingly at the inner diameter of the heightadjusting part 132 of the fixing bracket 130 corresponding to theconnection boss part 141 of the seat plate 140 engaging the rollingmember 150, and said rolling member 150 is characterized in that ahexagonal engaging part 152 is formed at the upper and lower portions ina hollow shape to accommodate therein the vertical rod, and a spiralbody 154 is formed between the hexagonal engaging part 152, and acompression spring 156 is provided at the inner side of the body 154 forpreventing the twisting of the rolling member 150 together with thecushion function of the sitting seat.
 6. A multifunctional chairaccording to claim 5, wherein said body 154 of the rolling member 150 ismade from a rubber material of a urethane for thereby providing arotation prevention function of a seat during a sitting type exercise.